Re: [PATCH v3 0/2] kho: history: track previous kernel version and kexec boot count

Breno Leitao
2026-01-09T11:00:22Z

Hello SJ,

On Thu, Jan 08, 2026 at 05:45:58PM -0800, SeongJae Park wrote:
> On Thu, 08 Jan 2026 08:40:57 -0800 Breno Leitao <leitao@debian.org> wrote:
>
> > Use Kexec Handover (KHO) to pass the previous kernel's version string
> > and the number of kexec reboots since the last cold boot to the next
> > kernel, and print it at boot time.
> >
> > Example
> > =======
> > [ 0.000000] Linux version 6.19.0-rc3-upstream-00047-ge5d992347849
> > ...
> > [ 0.000000] KHO: exec from: 6.19.0-rc4-next-20260107upstream-00004-g3071b0dc4498 (count 1)
>
> Nit. The above snippet uses tabs for first two lines, while the third line
> uses spaces. I don't really mind this of course, please feel free to ignore.
> I just wanted to prove I did read your cover letter ;)

Thanks for reading it very carefully.

[...]
> Sounds this feature will be useful! Thank you for detailed cover letter.
>
> > Signed-off-by: Breno Leitao <leitao@debian.org>
>
> The patches also look good to me. For the series,
>
> Acked-by: SeongJae Park <sj@kernel.org>
>
> > ---
> > Changes from v1 to RFC
>
> Nit. You mean "from RFC (v1) to v2"? Again, I don't really mind this trivial
> thing, so please feel free to ignore.

Ack, my fault here. I am using b4, and I need to learn how to deal with
RFC -> V1 ambiguity better.

If there is a need to update this patchset, I will get them fixed in the
next version.

Thanks for the review,
--breno